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Record Information
Version 1.0
Creation Date 2009-03-06 18:58:12 UTC
Update Date 2013-04-25 08:33:06 UTC
Accession Number T3D0163
Identification
Common Name 1,1,2-Trichloroethane
Description 1,1,2-Trichloroethane is a colorless, sweet-smelling liquid that does not burn easily and boils at a higher temperature than water. It is used mostly where 1,1-dichloroethene (vinylidene chloride) is made. 1,1,2-Trichloroethane is used as a solvent. When it is released into the environment, most 1,1,2-trichloroethane finally ends up in the air, but some may enter groundwater. Breakdown in both the air and groundwater is slow. (R717)
Compound Type
  • Organic Compound
  • Organochloride
  • Solvent
Chemical Structure
Thumb
Synonyms
  1. 1,1, 2-Trichloroethane
  2. 1,1,2-Trichloraethan
  3. 1,1,2-Trichlorethane
  4. 1,1,2-Trichloroethane
  5. 1,2,2-Trichloroethane
  6. Beta-trichloroethane
  7. Beta.-trichloroethane
  8. Ethane trichloride
  9. Trichloroethane
  10. Trojchloroetan(1,1,2) [Polish]
  11. Vinyl trichloride
  12. Vinyltrichloride
Chemical Formula C2H3Cl3
Average Molecular Weight 133.404
Monoisotopic Molecular Weight 131.930033217
Chemical IUPAC Name
1,1,2-trichloroethane
CAS Registry Number 79-00-5
SMILES
ClCC(Cl)Cl
InChI Identifier
InChI=1S/C2H3Cl3/c3-1-2(4)5/h2H,1H2
InChI Key InChIKey=UBOXGVDOUJQMTN-UHFFFAOYSA-N
Chemical Taxonomy
Kingdom Organic Compounds
Super Class Organic Halides
Class Organochlorides
Sub Class Alkyl Chlorides
Direct Parent Alkyl Chlorides
Alternative Parents Not Available
Molecular Framework Aliphatic Acyclic Compounds
Substituents Not Available
External Descriptors
  • a small molecule(Cyc)
  • chloroethanes(ChEBI)
DrugBank ID Not Available
PubChem Compound ID 6574 Link_out
KEGG ID Not Available
UniProt ID Not Available
OMIM ID Not Available
ChEBI ID 36018 Link_out
BioCyc ID CPD-8985 Link_out
CTD ID C024567 Link_out
Stitch ID 1,1,2-Trichloroethane Link_out
PDB ID Not Available
ACToR ID 1412
Wikipedia Link http://en.wikipedia.org/wiki/1,1,2-Trichloroethane Link_out
Physical Properties
Appearance Colorless liquid.
Melting Point -36.6 C
Solubility 4.59 mg/mL at 25 °C [HORVATH,AL et al. (1999)]
Predicted LogP 2.1692048943333333
Toxicity Profile
Route of Exposure Inhalation (R718) ; oral (R718) ; dermal (R718)
Mechanism of Action Acyl chlorides and free radicals formed during the metabolism of 1,1,2-trichloroethane are reactive metabolites that can bind to proteins and nucleic acids (DNA, RNA), and are suspected of being cytotoxic, mutagenic, and carginogenic. (R717, R733)
Metabolism After 1,1,2-trichloroethane enters the body, it is carried by the blood to organs and tissues such as the liver, kidney, brain, heart, spleen, and fat. The primary metabolites identified are chloroacetic acid, S-carboxymethylcysteine, and thiodiacetic acid. S-carboxymethycysteine and thiodiacetic acid are formed from 1,1,2-trichloroethane following conjugation with glutathione. Chloroacetic acid is formed by hepatic cytochrome P-450. This reaction is thought to proceed via the acyl chloride. Cytochrome P-450 can also produce free radicals from 1,1,2-trichloroethane. Experiments show that most 1,1,2-trichloroethane leaves the body unchanged in the breath and as other substances that it is changed into in the urine in about 1 day. (R717)
Toxicity Values LD50: 837 mg/kg (Oral, Rat) (R720) LD50: 5.38 g/kg (Dermal, Rabbit) (R720)
Lethal Dose Not Available
Carcinogenicity (IARC Classification) 3, not classifiable as to its carcinogenicity to humans. (R264)
Uses/Sources 1,1,2-Trichloroethane is used as a solvent. Exposure to 1,1,2-trichloroethane would most likely be from breathing vapors of the chemical or from skin contact. Drinking contaminated water is also a route of exposure. (R717)
Minimum Risk Level Acute Oral: 0.3 mg/kg/day (Mouse) (R717) Intermediate Oral: 0.04 mg/kg/day (Mouse) 9R717)
Health Effects Inhalation of high levels of 1,1,2-trichloroethanein can affect the nervous system and cause sleepiness. 1,1,2-Trichloroethane may also affect the liver, kidney, and digestive tract, produce skin irritation, and affect the body's ability to fight infections. (R717)
Symptoms Inhalation or ingestion of 1,1,2-trichloroethane can cause dizziness, drowsiness, headache, nausea, shortness of breath, and unconsciousness. The compound can be absorbed following dermal contact. Skin exposure can also lead to temporary stinging and burning pain. Other symptoms of exposure to this compound may include irritation of the skin, eyes, nose, mucous membranes, and upper respiratory tract. (R718, R327)
Treatment Following ingestion, administer charcoal as a slurry (240 mL water/30 g charcoal). Usual dose: 25 to 100 g in adults/adolescents, 25 to 50 g in children (1 to 12 years), and 1 g/kg in infants less than 1 year old. Consider gastric lavage after ingestion of a potentially life-threatening amount of poison if it can be performed soon after ingestion. In case of seizures, administer a benzodiazepine IV. Following inhalation exposure, move patient to fresh air. Monitor for respiratory distress. If cough or difficulty breathing develops, evaluate for respiratory tract irritation, bronchitis, or pneumonitis. Administer oxygen and assist ventilation as required. Treat bronchospasm with inhaled beta2 agonist and oral or parenteral corticosteroids. In case of eye exposure, irrigate exposed eyes with copious amounts of room temperature water for at least 15 minutes. In case of dermal exposure, remove contaminated clothing and wash exposed area thoroughly with soap and water. (R383)
References
General References
  • R717 — ATSDR - Agency for Toxic Substances and Disease Registry (1989). Toxicological profile for 1,1,2-trichloroethane. U.S. Public Health Service in collaboration with U.S. Environmental Protection Agency (EPA). [Link]
  • R718 — International Programme on Chemical Safety (IPCS) INCHEM (1995). Poison Information Monograph for Cadmium. [Link]
  • R733 — Mazzullo M, Colacci A, Grilli S, Prodi G, Arfellini G: 1,1,2-Trichloroethane: evidence of genotoxicity from short-term tests. Jpn J Cancer Res. 1986 Jun;77(6):532-9. [2426232 Link_out]
  • R720 — Organization for Economic Cooperation and Development (2000). Screening Information Data Set for 1,1,2-Trichloroethane (79-00-5). [Link]
  • R264 — International Agency for Research on Cancer (2009). IARC Monographs on the Evaluation of Carcinogenic Risks to Humans. [Link]
  • R327 — Bingham, E, Cohrssen, B, and Powell, CH (2001). Patty's Toxicology Volumes 1-9. 5th ed. New York, N.Y: John Wiley & Sons.
  • R383 — Rumack BH (2009). POISINDEX(R) Information System. Englewood, CO: Micromedex, Inc. CCIS Volume 141, edition expires Aug, 2009.

Targets

1. Cytokine receptor common subunit beta

High affinity receptor for interleukin-3, interleukin-5 and granulocyte-macrophage colony-stimulating factor.

1,1,2-Trichloroethane and its metabolites bind to DNA. (R717)
UniProt ID: P32927 Link_out
Gene: CSF2RB Link_out
Protein Sequence: FASTA
Gene Sequence: FASTA
SNPs: SNPJam Report Link_out
References:
  • R717 — ATSDR - Agency for Toxic Substances and Disease Registry (1989). Toxicological profile for 1,1,2-trichloroethane. U.S. Public Health Service in collaboration with U.S. Environmental Protection Agency (EPA). [Link]

2. RNA

1,1,2-Trichloroethane and its metabolites bind to RNA. (R733)
UniProt ID: RNA Link_out
References:
  • R733 — Mazzullo M, Colacci A, Grilli S, Prodi G, Arfellini G: 1,1,2-Trichloroethane: evidence of genotoxicity from short-term tests. Jpn J Cancer Res. 1986 Jun;77(6):532-9. [2426232 Link_out]

3. Estrogen receptor

Nuclear hormone receptor. The steroid hormones and their receptors are involved in the regulation of eukaryotic gene expression and affect cellular proliferation and differentiation in target tissues. Ligand-dependent nuclear transactivation involves either direct homodimer binding to a palindromic estrogen response element (ERE) sequence or association with other DNA-binding transcription factors, such as AP-1/c-Jun, c-Fos, ATF-2, Sp1 and Sp3, to mediate ERE-independent signaling. Ligand binding induces a conformational change allowing subsequent or combinatorial association with multiprotein coactivator complexes through LXXLL motifs of their respective components. Mutual transrepression occurs between the estrogen receptor (ER) and NF-kappa-B in a cell-type specific manner. Decreases NF-kappa-B DNA-binding activity and inhibits NF-kappa-B-mediated transcription from the IL6 promoter and displace RELA/p65 and associated coregulators from the promoter. Recruited to the NF-kappa-B response element of the CCL2 and IL8 promoters and can displace CREBBP. Present with NF-kappa-B components RELA/p65 and NFKB1/p50 on ERE sequences. Can also act synergistically with NF-kappa-B to activate transcription involving respective recruitment adjacent response elements; the function involves CREBBP. Can activate the transcriptional activity of TFF1. Also mediates membrane-initiated estrogen signaling involving various kinase cascades. Isoform 3 is involved in activation of NOS3 and endothelial nitric oxide production. Isoforms lacking one or several functional domains are thought to modulate transcriptional activity by competitive ligand or DNA binding and/or heterodimerization with the full length receptor. Isoform 3 can bind to ERE and inhibit isoform 1.

Causes endocrine disruption in humans by binding to and inhibiting the estrogen receptor. (S301)
UniProt ID: P03372 Link_out
Gene: ESR1 Link_out
Protein Sequence: FASTA
Gene Sequence: FASTA
SNPs: SNPJam Report Link_out
References:
  • S301 — Luft S, Milki E, Glustrom E, Ampiah-Bonney R, O'Hara P. Binding of Organochloride and Pyrethroid Pesticides To Estrogen Receptors ? and ?: A Fluorescence Polarization Assay. Biophysical Journal 2009;96(3):444a.

4. Estrogen receptor beta

Nuclear hormone receptor. Binds estrogens with an affinity similar to that of ESR1, and activates expression of reporter genes containing estrogen response elements (ERE) in an estrogen-dependent manner. Isoform beta-cx lacks ligand binding ability and has no or only very low ere binding activity resulting in the loss of ligand-dependent transactivation ability. DNA-binding by ESR1 and ESR2 is rapidly lost at 37 degrees Celsius in the absence of ligand while in the presence of 17 beta-estradiol and 4-hydroxy-tamoxifen loss in DNA-binding at elevated temperature is more gradual.

Causes endocrine disruption in humans by binding to and inhibiting the estrogen receptor. (S301)
UniProt ID: Q92731 Link_out
Gene: ESR2 Link_out
Protein Sequence: FASTA
Gene Sequence: FASTA
SNPs: SNPJam Report Link_out
References:
  • S301 — Luft S, Milki E, Glustrom E, Ampiah-Bonney R, O'Hara P. Binding of Organochloride and Pyrethroid Pesticides To Estrogen Receptors ? and ?: A Fluorescence Polarization Assay. Biophysical Journal 2009;96(3):444a.